User Agelos

16 votes

0 answers

295 views

Does every infinite, connected, locally finite, vertex-transitive graph have a leafless spanning tree?

asked Feb 10 at 14:49

14 votes

4 answers

1k views

A notion of 2-dimensional tree

asked Mar 31, 2022 at 12:30

12 votes

2 answers

512 views

Embedding Z into Z^2 with large distortion

asked Sep 27, 2015 at 18:25

11 votes

1 answer

334 views

How wild can an open topological 3-manifold be if it has a compact quotient?

asked May 3, 2022 at 15:04

11 votes

1 answer

172 views

Do any two closed, countable, homeomorphic subsets of $\mathbb{R}^3$ have homeomorphic complements?

asked Jun 3, 2022 at 14:12

8 votes

1 answer

309 views

Does every generating set of the first homology group of a Cayley graph give rise to a presentation of its group?

asked Dec 29, 2015 at 19:42

8 votes

1 answer

681 views

Problem 3.14 from Kirby's list

asked May 4 at 10:04

8 votes

1 answer

362 views

On homeomorphic subsets of $\mathbb{R}^3$ with non-homeomorphic complements

asked Jun 1, 2022 at 20:09

7 votes

4 answers

509 views

Is every virtually free group residually finite?

asked Apr 27, 2022 at 7:43

6 votes

1 answer

443 views

Does every simply connected, orientable, non-compact, 3-manifold embed in $\mathbb{R}^3$?

asked Apr 20, 2022 at 6:27

6 votes

0 answers

115 views

Hamiltonicity for triangulations of the 3-sphere

asked Sep 24, 2021 at 15:31

6 votes

2 answers

441 views

From topological actions on $\mathbb{R}^3$ to isometric actions

asked Mar 11, 2022 at 17:08

6 votes

4 answers

869 views

Can editors move a journal to a different publisher?

asked Mar 31 at 18:36

4 votes

1 answer

160 views

Is the intersection of such a triple of minimal surfaces in the 3-ball a single point?

asked Apr 25 at 14:16

4 votes

0 answers

94 views

Classes of graphs that are minors of bounded degree graphs in the same class

asked Nov 17, 2022 at 15:32

4 votes

0 answers

55 views

Are the countable (rayless) trees with wqo labels wqo?

asked Apr 5, 2022 at 12:58

4 votes

1 answer

145 views

Extending a 2-complex embedded in $\mathbb{S}^3$ into a simply connected one

asked Sep 7, 2021 at 10:48

4 votes

1 answer

108 views

Does every hyperbolic, almost-transitive, triangulation of $\mathbb{R}^n$ have boundary homeomorphic with $\mathbb{S}^{n-1}$?

asked May 20, 2022 at 14:26

4 votes

1 answer

208 views

What is the Freudenthal compactification of a wildly punctured n-sphere?

asked Jul 31, 2022 at 16:59

3 votes

0 answers

174 views

Decidable properties of the Cayley complex of a presentation

asked Mar 25, 2015 at 11:32

3 votes

0 answers

61 views

Hamilton cycles in Cayley graphs: between Rapaport-Strasser and Fleischner

asked Oct 31, 2022 at 12:05

2 votes

0 answers

117 views

Is each good topological 3-orbifold homeomorphic to a CW-complex?

asked Apr 14, 2022 at 13:37

2 votes

0 answers

132 views

Subsets of $\mathbb{S}^n$ fixed by an orientation-reversing self-homeomorphism — Part 1

asked Aug 22, 2022 at 20:12

2 votes

1 answer

111 views

Subsets of $\mathbb{S}^n$ fixed by an orientation-reversing self-homeomorphism — Part 2

asked Aug 22, 2022 at 20:18

2 votes

1 answer

188 views

Examples of group families with solvable uniform word problem

asked Jun 20, 2022 at 7:56

1 vote

0 answers

67 views

How large can a planar triangulation be that embeds bi-Lipschitz in a ball of $\mathbb{R^3}$?

asked Mar 25, 2020 at 14:43

1 vote

0 answers

51 views

A multi-layer version of Menger's theorem

asked Feb 2 at 12:40

1 vote

1 answer

33 views

Graphs admitting an 1-Lipschitz map from edge mid-points to vertices

asked Aug 30 at 10:52

Stack Exchange Network

28 Questions

Does every infinite, connected, locally finite, vertex-transitive graph have a leafless spanning tree?

A notion of 2-dimensional tree

Embedding Z into Z^2 with large distortion

How wild can an open topological 3-manifold be if it has a compact quotient?

Do any two closed, countable, homeomorphic subsets of $\mathbb{R}^3$ have homeomorphic complements?

Does every generating set of the first homology group of a Cayley graph give rise to a presentation of its group?

Problem 3.14 from Kirby's list

On homeomorphic subsets of $\mathbb{R}^3$ with non-homeomorphic complements

Is every virtually free group residually finite?

Does every simply connected, orientable, non-compact, 3-manifold embed in $\mathbb{R}^3$?

Hamiltonicity for triangulations of the 3-sphere

From topological actions on $\mathbb{R}^3$ to isometric actions

Can editors move a journal to a different publisher?

Is the intersection of such a triple of minimal surfaces in the 3-ball a single point?

Classes of graphs that are minors of bounded degree graphs in the same class

Are the countable (rayless) trees with wqo labels wqo?

Extending a 2-complex embedded in $\mathbb{S}^3$ into a simply connected one

Does every hyperbolic, almost-transitive, triangulation of $\mathbb{R}^n$ have boundary homeomorphic with $\mathbb{S}^{n-1}$?

What is the Freudenthal compactification of a wildly punctured n-sphere?

Decidable properties of the Cayley complex of a presentation

Hamilton cycles in Cayley graphs: between Rapaport-Strasser and Fleischner

Is each good topological 3-orbifold homeomorphic to a CW-complex?

Subsets of $\mathbb{S}^n$ fixed by an orientation-reversing self-homeomorphism — Part 1

Subsets of $\mathbb{S}^n$ fixed by an orientation-reversing self-homeomorphism — Part 2

Examples of group families with solvable uniform word problem

How large can a planar triangulation be that embeds bi-Lipschitz in a ball of $\mathbb{R^3}$?

A multi-layer version of Menger's theorem

Graphs admitting an 1-Lipschitz map from edge mid-points to vertices